package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RedisConstants;
import com.hmdp.utils.RegexUtils;
import com.hmdp.utils.SystemConstants;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {

    @Autowired
    private StringRedisTemplate redisTemplate;
    @Resource
    private StringRedisTemplate stringRedisTemplate;

    /**
     * 发送手机验证码
     * @param phone  手机号
     * @return  code
     */
    @Override
    public Result sendCode(String phone, HttpSession session) {
        //1.校验手机号
        if(RegexUtils.isPhoneInvalid(phone)){
            //2.如果不符合 返回错误信息\
            return Result.fail("手机号格式错误");
        }
        //3.符合，生成验证码
        String code = RandomUtil.randomNumbers(6);
        //4.保存验证码到session
        stringRedisTemplate.opsForValue().set(RedisConstants.LOGIN_CODE_KEY +phone,code,RedisConstants.LOGIN_CODE_TTL, TimeUnit.MINUTES);
        //5.发送验证码
        log.info("发送验证码成功！验证码为：{}",code);
        //返回ok
        return Result.ok();
    }

    /**
     * 登录功能
     * @param loginForm 登录参数，包含手机号、验证码；或者手机号、密码
     */
    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        //1.校验手机号
        String phone = loginForm.getPhone();
        if(RegexUtils.isPhoneInvalid(phone)){
            //2.如果不符合 返回错误信息\
            return Result.fail("手机号格式错误");
        }
        //3.校验验证码
        Object cacheCode = redisTemplate.opsForValue().get(RedisConstants.LOGIN_CODE_KEY+phone);
        String code = loginForm.getCode();
        if(cacheCode == null || !cacheCode.equals(code)){
            //3.不一致 直接报错
            return Result.fail("验证码错误");
        }
        //4.一致 根据手机号查询用户
        User user = query().eq("phone", phone).one();
        //5.判断用户是否存在
        if (user == null) {
            //6.不存在 创建新用户保存
            user = createUserWithPhone(phone);
        }
        //7.保存用户信息到session
        //7.1随机生成token
        String token = UUID.randomUUID().toString(true);
        //7.2将user对象转为hashmap存储
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        Map<String, Object> userMap = BeanUtil.beanToMap(userDTO,new HashMap<>() ,
                CopyOptions.create()
                        .setIgnoreNullValue(true)
                        .setFieldValueEditor((fieldName,fieldValue)->fieldValue.toString()));

        //7.3存储
        stringRedisTemplate.opsForHash().putAll(RedisConstants.LOGIN_USER_KEY+token,userMap);

        //设置有效期
        stringRedisTemplate.expire(RedisConstants.LOGIN_USER_KEY+token,RedisConstants.LOGIN_USER_TTL,TimeUnit.MINUTES);

        //8返回token
        return Result.ok(token);
    }

    private User createUserWithPhone(String phone) {
        //1.创建用户
        User user = new User();
        user.setPhone( phone);
        user.setNickName(SystemConstants.USER_NICK_NAME_PREFIX + RandomUtil.randomString(10));
        //2.保存用户 mp
        save(user);
        return user;
    }
}
